.box {
  margin: 36px auto;
  display: flex;
  width: 324px;
  flex-wrap: wrap;
  justify-content: space-between;
}

.item {
  margin-bottom: 12px;
  width: 100px;
  height: 100px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  box-sizing: border-box;
  border: 1px solid #e5e5e5;
}

.activeItem {
  border: 1px solid red;
}
